/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: ling
 * Date: 2022-05-23
 * Time: 22:23
 */
public class Test {
    public static void main(String[] args) {
        StringBuilder stringBuilder=new StringBuilder();
        stringBuilder.append(1+1);
        System.out.println(stringBuilder);
        char c='c';
        for (int i = 0; i <= 1; i++) {
            char ret= (char) (c+i);
            System.out.println(ret);
        }
    }
}
